Child themes allow you to make changes to an existing theme without modifying the original theme’s files. This is the safest approach to making changes to an existing theme, because you can update the parent theme without losing your changes.

Wish your site was as fast as this?

Do It With WordPress is proudly hosted by WP Engine, the very best WordPress hosting that money can buy.

Aside from being blazing fast, it's very secure, has a staging area to test changes before making them live, automated daily backups, malware scanning, stellar support from WordPress experts... It's just everything that you would want from your host, and more.